4 EHIZOPODA. 



Class I. Rhizopoda (Gymnomyxa). 



Protozoans devoid of cuticle whose protoplasmic body takes in food, 

 and, in many cases, moves by means of retractile pseudopodia. A skeleton 

 frequently present. Reproduction by fission or formation of swarm- 

 spores. 



Order 1. Proteomyxa. A heterogeneous group of small forms with 

 inconspicuous nuclei, and pseudopodia of various nature : Protomyxa, 

 Protomonas, Vampyrella, Protogenes, Archerina. 



Order 2. Labyrinthulidea. Protozoans consisting of a protoplasmic 

 network with travelling spindles : Labyrinthula, Chlamydomyxa. 



Order 3. Mycetozoa (Myxomycetes). Rhizopods in which the body is 

 an active plasmodium, producing coated spores : Ceratium, Trichia, 

 ^Sthalium (flowers of tan). 



